Congregation of Notre-Dame de Sion

The Congregation of Our Lady of Sion (French: Congrégation de Notre-Dame de Sion, abbreviated by its members as N.D.S.) is composed of two Roman Catholic religious congregations founded in Paris, France. One is composed of Catholic priests and Religious Brothers, founded in 1852, and another of Religious Sisters, founded in 1843, both by Marie Theodor Ratisbonne, along with his brother Marie-Alphonse Ratisbonne, "to witness in the Church and in the world that God continues to be faithful in his love for the Jewish people and to hasten the fulfillment of the promises concerning the Jews and the Gentiles." (Constitution, article 2).

The Ratisbonne brothers, who were Jews, were being drawn to accept Christianity. For Theodore, this came about as through the conversion of several close friends and the slow results of study and reading. He was baptized in 1826 and ordained in 1830.

Alphonse, however, was more reluctant to believe in Christ. This changed dramatically on 20 January 1842 in the course of a trip to Rome, made just prior to his planned wedding. While on a visit to the Church of Sant'Andrea delle Fratte, the Blessed Virgin Mary appeared to him. Both brothers believed that this was a sign from God, not only for Alphonse's personal conversion, but of their common call to bring their fellow Jews to accept the Christian faith.

To this end, Alphonse was baptized and soon entered the Society of Jesus, where he spent several years. In 1843 Theodore founded a small community of women who wished to collaborate with him in the education of Jewish children, starting with two Jewish sisters who had come to him for guidance and later converted to Christianity. In 1850, with the permission of the pope and of the Jesuit Superior General, Alphonse left the Society to join his brother and his work. Together the Ratisbonne brothers established the Congregation of the Fathers of Our Lady of Sion in 1852.

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